I think the only thing that works to really hold costs down is a claiming rule like they have in circle track.
I've seen bracket racing cars that I'm sure are a strong six-figure operation.

from my efforts in my drag week hot rod coupe, I've learned a lot about the drawbacks of the first gen Hemi in naturally aspirated, mainly a small bore that hinders breathing. I know in naturally aspirated, it's a lot easier and cheaper per horsepower to build a Gen 2 Hemi.

It needs to be a production block, no aftermarket blocks. One thing I'm getting clarification on is if the Mopar performance iron replacement Hemi block is allowed.